Electrode of electron gun and electron gun using the same

Abstract

An electrode of an electron gun, and an electron gun for a cathode ray tube are provided. The electron gun includes a first electrode member having supporting portions protruding from both edges thereof along a lengthwise direction, and three connection holes disposed in an in-line arrangement, and second electrode members connected to the connection holes of the first electrode member, and each having a plane portion where electron beam passing holes are formed, and a flange portion formed along the periphery of the plane portion and connected to the periphery of each connection hole of the first electrode member.

What is claimed is:  
     
       1. An electrode of an electron gun comprising: 
       a first electrode member having supporting portions protruding from both edges thereof along a lengthwise direction, and three connection holes disposed in an in-line arrangement; and  
       second electrode members connected to the connection holes of the first electrode member, and each having a plane portion where electron beam passing holes are formed, and a flange portion formed along the periphery of the plane portion and connected to the periphery of each connection hole of the first electrode member.  
     
     
       2. The electrode according to  claim 1 , wherein depressions are formed by press-molding peripheries of the electron beam passing holes formed in the plane portion. 
     
     
       3. The electrode according to  claim 1 , wherein a bead is formed between the plane portion and the flange portion. 
     
     
       4. The electrode according to  claim 1 , wherein the shapes of the electron beam passing holes are circular, elliptical or polygonal. 
     
     
       5. The electrode according to  claim 1 , wherein the weight of the central second electrode member is different from that of either side second electrode member. 
     
     
       6. The electrode according to  claim 5 , wherein the weight of the central second electrode member is 1.0 to 1.2 times that of either side second electrode member. 
     
     
       7. The electrode according to  claim 2 , wherein the thicknesses of portions in the second electrode members, where the electron beam passing holes are formed, are different. 
     
     
       8. The electrode according to  claim 3 , wherein the length of a cylindrical portion produced by forming the bead around the plane portion is equal to or less than 2.0 mm. 
     
     
       9. An electron gun for a cathode ray tube, the electron gun having a cathode, a control electrode and a screen electrode together constituting a triode section, and a plurality of focusing electrodes sequentially installed from the screen electrode, wherein the control electrode or the screen electrode comprises: 
       a first electrode member having supporting portions protruding from both edges of the control electrode or the screen electrode along a lengthwise direction and having three connection holes disposed in an in-line arrangement; and  
       second electrode members connected to the connection holes of the first electrode member, and each having a plane portion where electron beam passing holes are formed, and a flange portion formed along the periphery of the plane portion and connected to the periphery of each connection hole of the first electrode member.  
     
     
       10. The electron gun according to  claim 9 , wherein depressions are formed by press-molding peripheries of the electron beam passing holes formed in the plane portion. 
     
     
       11. The electron gun according to  claim 9 , wherein a bead is formed between the plane portion and the flange portion. 
     
     
       12. The electron gun according to  claim 9 , wherein the shapes of the electron beam passing holes are circular, elliptical or polygonal. 
     
     
       13. The electron gun according to  claim 9 , wherein the weight of the central second electrode member is different from that of either side second electrode member. 
     
     
       14. The electron gun according to  claim 13 , wherein the weight of the central second electrode member is 1.0 to 1.2 times that of either side second electrode member. 
     
     
       15. The electron gun according to  claim 10 , wherein the thicknesses of portions in the second electrode members, where the electron beam passing holes are formed, are different. 
     
     
       16. The electron gun according to  claim 11 , wherein the length of a cylindrical portion produced by forming the bead around the plane portion is equal to or less than 2.0 mm.